Quantum Data 780C, User Manual

Page: 173 / 240

780C Multi-Interface Interoperability Tester
– User Guide
Page 172
September 29, 2014 Revision A1
9 Using the 780C Test Instrument to Test HDMI Cable or Repeaters
This section provides procedures for testing HDMI cables, cable extenders, splitters, repeaters, etc. The
HDMI/DVI Cable Test runs a pixel error test on the TMDS leads and a continuity check on the 5V & hot plug
leads and the DDC leads. The Repeater test runs a pixel error test on the TMDS leads and a continuity check
on the 5V & hot plug leads and the DDC leads but additionally tests the hot plug delay and the hot plug width.
The cable test and repeater test can be used when the source and sink ends are collocated, in other words can
be connected to the 780C Tx and Rx ports. For a cable or distribution system that is installed and where the
source and sink ends cannot be connected to the 780C, you can use the Frame Compare feature. The Frame
Compare feature captures a reference frame and then compares a series of captured frames pixel by pixel to
the reference frame.
The features and functions described in this section are included only if you have purchased the HDMI
Cable and Link Test option.
9.1 HDMI/HDBaseT Cable or Repeater Test
The HDMI/DVI/HDBaseT Cable Test runs a test on all the leads in the HDMI/HDBaseT (CAT) cable and HDMI
or HDBaseT networks (when extenders, splitters, switchers and repeaters are used) except the power bus as
follows:

Pixel error test using a pseudo-noise pattern on the TMDS lines using three separate timings:
o
480p60 using 8 bit/component color
o
720p60 using 8 bit/component color
o
1080p60 using 8 bit/component color
o
1080p60 using 12 bit/component (deep color)
o
2160p30 using 8 bit/component color

Read/write test on the DDC leads and the CEC bus. It reads an EDID at the output from the input.

Continuity test on the 5V/Hot plug leads.

Hot plug delay and hot plug pulse width. The hot plug delay is the time that elapses between the falling
edge of the hot plug line on the on the sink side of a repeater and the falling edge of the hot plug line on the
source side. The hot plug pulse width is the time that the hot plug pulse goes low as detected on the HDMI
Tx side.
9.1.1 Configurations for Running an HDMI/HDBaseT Cable or Repeater Test
This subsection provides configurations supported when performing an HDMI/HDBaseT cable test or a test of
an HDMI network comprised of repeaters, splitters, extenders, switches, etc.